<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>应用登录</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Arial, sans-serif;
        }

        body {
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        }

        .login-box {
            background: rgba(255, 255, 255, 0.95);
            padding: 2.5rem;
            border-radius: 20px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            width: 90%;
            max-width: 400px;
        }

        h1 {
            text-align: center;
            color: #2d3748;
            margin-bottom: 2rem;
            font-size: 2.2rem;
        }

        .input-group {
            margin-bottom: 1.5rem;
        }

        input {
            width: 100%;
            padding: 12px 20px;
            border: 2px solid #e2e8f0;
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }

        input:focus {
            outline: none;
            border-color: #667eea;
        }

        button {
            width: 100%;
            padding: 14px;
            background: #667eea;
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.3s ease;
        }

        button:hover {
            background: #764ba2;
        }

        .links {
            margin-top: 1.5rem;
            text-align: center;
        }

        a {
            color: #667eea;
            text-decoration: none;
            font-size: 0.9rem;
        }

        @media (max-width: 480px) {
            .login-box {
                padding: 1.5rem;
            }
        }
    </style>
</head>
<body>
    <div class="login-box">
        <h1>欢迎登录</h1>
        <form>
            <div class="input-group">
                <input type="text" placeholder="用户名/手机号" required>
            </div>
            <div class="input-group">
                <input type="password" placeholder="密码" required>
            </div>
            <button type="submit">立即登录</button>
            <div class="links">
                <a href="#">忘记密码？</a> | <a href="#">注册新账号</a>
            </div>
        </form>
    </div>
</body>
</html>
